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Quality Control

To ensure the accuracy and precision of results, the USUAL follows strict quality control/quality assurance guidelines. We are familiar with EPA certification guidelines (although it is cost prohibitive for us to be certified). We participate in several proficiency testing programs including:

  • NAPT - North American Proficiency Testing Program for Agricultural Labs (and act as contract lab for program.)
  • NAPT PAP - NAPT Performance Assessment Program
  • MAP - Manure Analysis Program
  • NFTA - National Forage Testing Association (NIR and Wet Chem)